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Finding the Fourth Proportional to 389,925.88, 584,888.81 and 140,607.88

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Solution

The fourth proportional to 389,925.88, 584,888.81 and 140,607.88 is: 210,911.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,925.88 : 584,888.81 = 140,607.88 : x
  2. Step 2: Convert to fraction form
    389,925.88/584,888.81 = 140,607.88/x
  3. Step 3: Cross multiply
    389,925.88x = 584,888.81 × 140,607.88
  4. Step 4: Simplify right side
    389,925.88x = 82,239,975,609.82
  5. Step 5: Solve for x
    x = 82,239,975,609.82/389,925.88
  6. Step 6: Final answer
    x = 210,911.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.